American musician Oliver Tree, known for songs like “Life goes on” and “Miss you,” was among six people killed in a helicopter crash in Rio de Janeiro, Brazil, on Sunday. The crash occurred when two helicopters collided, falling onto a parking lot belonging to an electric vehicle dealership. Tree, 32, had nearly 20 million followers on social media and was reportedly in the middle of a world tour at the time of the incident. He recently performed a concert in São Paulo last weekend. News agencies AFP and CNN Brasil first reported the musician’s death. Authorities are investigating the cause of the collision.